BS 5268-4.2:1990
Superseded
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Structural use of timber. Fire resistance of timber structures Recommendations for calculating fire resistance of timber stud walls and joisted floor constructions
Hardcopy , PDF
English
30-04-1990
30-03-2010
Foreword
Committees responsible
Recommendations
1 Scope
2 Definitions
3 Fire resistance criteria
4 Materials
5 Construction details
6 Calculation method
Appendix
A Worked examples
Tables
1 Internal walls required to provide a fire resistance
performance of 30:30:30 min. Single leaf walls of
symmetrical/asymmetrical construction exposed to
fire from one side at a time
2 Internal walls required to provide a fire resistance
performance of 60:60:60 min. Single leaf walls of
symmetrical/asymmetrical construction exposed to
fire from one side at a time
3 Internal walls required to provide a fire resistance
performance of 60:60:60 min. Double leaf walls of
symmetrical/asymmetrical construction exposed to
fire from either side
4 External walls required to provide a fire resistance
performance of 30:30:15 min. Single leaf walls of
symmetrical/asymmetrical construction exposed to
fire from the inside only
5 External walls required to provide a fire resistance
performance of 30:30:30 min. Single leaf walls of
symmetrical/asymmetrical construction exposed to
fire from one side
6 External walls required to provide a fire resistance
performance of 60:60:60 min and 60:60:15 min. Single
leaf walls of symmetrical/asymmetrical construction
exposed to fire from one side at a time
7 Specification of materials and conditions of fixings
for walls
8 Timber floors, concealed joists, required to provide
fire resistance performance of 30:15:15 min and
30:30:30 min
9 Timber floors, concealed joists, required to provide
a fire resistance performance of 60:60:60 min
10 Timber floors, exposed joists, required to provide a
fire resistance performance of 30:30:30 min
11 Specification of materials and conditions of fixing
for floors
Figures
1 Diagram showing depth x breadth of stud and breadth
of joist
2 Profiles for tongued and grooved ceiling boards
3 Methods of fixing insulation materials in walls
4 Methods of fixing insulation materials in floors
5 Method of fixing ceiling linings to exposed joists
Extends the code given in Section 4.1 of BS 5268 to include composite timber elements.
| Committee |
B/525/5
|
| DevelopmentNote |
Supersedes 86/14933 DC. (07/2005) Reviewed and confirmed by BSI, November 2007. (10/2007)
|
| DocumentType |
Standard
|
| Pages |
28
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
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